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1. Set the operation mode to power balance mode, and use optical fiber communication between the two main units
2. Set the droop control to 1-2 Hz to achieve dynamic power balance
3. Appropriately adjust the current loop and speed loop of the P3 vector group to ensure stable current output

These series HT3360-500K，RM20-90K（PM10-15K）RM25-600K(PM30X)，RM25-200K(PM25C)，RM40-500K(PM50)，RM600/60D，RM600-1000K(PM100DFaults such as bus overvoltage, explosion, and output overload occur.

A: To check the "Scope" menu on the display, look at the output voltage and current waveforms. To zoom in on the current waveform, click "Zoom In" when it is displayed in Small mode.
The purpose is: to see the type of load, whether it is industrial control load, because industrial control load has energy feedback to the UPS, causing unstable operation.
The current solution is to install the BAU (discharge device

What is the difference between the STO function on GD series models equipped with STO and the coast to stop function of the S-terminal?

A: The results are the same; both STO and free stop will block the output, but STO will trigger a fault. STO is controlled by hardware circuitry, while coast to stop is controlled by software. STO offers greater safety and stability.

An emergency stop involves decelerating to a stop, but the deceleration time is based on P01.26 (Emergency Stop Time), which differs from P00.12 (Deceleration Stop Time) used for normal deceleration stops. The coast to stop immediately block the output, whereas a deceleration stop does not.

No. The AI/AO and expansion card PTC temperature measurement function of the GD350A is not Ex/ATEX certified.

The basic principle applies when the outlets of two fans share the same duct. If one fan spins significantly faster than the other, the resulting pressure difference drives the slower fan to accelerate until its speed matches that of the faster fan. At this point, the slower fan enters a generator mode, feeding energy back into the VFD and causing the VFD's DC bus voltage to rise. If the voltage reaches the over-voltage stall threshold, the VFD controlling the slower motor automatically increases its output frequency to match the actual rotational speed. Consequently, the fan exits generator mode and returns to motor mode; it stops generating power, and the VFD's DC bus voltage drops.

Troubleshooting for UPS Fault Code 65, Applicable Model: HT(R)X 01-20KVA S L
Q: The UPS displays fault code 65 and fails to start normally. According to the user manual, this fault indicates low battery voltage. How should we troubleshoot this issue?

A: When this series of UPS triggers fault code 65, the control logic will prevent normal startup. This fault is mainly caused by three factors: faulty UPS charger, damaged batteries, or abnormal battery voltage detection circuit.
Please follow the steps below to locate the root cause:
1.Check the actual battery voltage and confirm whether it matches the value displayed on the UPS screen, so as to determine whether the fault originates from the detection circuit on the power board.
1）If consistent:
Disconnect the two battery BUS cables connected to the UPS power board and restart the UPS. Next, measure the DC voltage at the battery BUS cable terminals on the power board to verify whether the measured voltage is roughly equal to the reading shown on the UPS screen and check if the UPS can start normally.
NOTES:
Make sure to discharge the capacitors at these terminals before disconnecting or reconnecting the battery BUS cables.
2）If inconsistent: The battery voltage detection circuit on the power board may be damaged, which requires replacement of the power board.

1. Due to the current limitation of the UPS cabinet back board, only one interface of one BAU can be connected to the module back board of one UPS cabinet.
2. It is recommended to connect the working input terminal of BAU to the output N terminal of UPS, rather than the main input N terminal of UPS, to prevent the disconnection of the N wire in the UPS circuit (such as turning off the output switch of UPS, the N wire of UPS will be disconnected), which may cause interruption of the N wire on BAU and result in abnormal voltage sampling of BAU, causing damage to BAU during operation.
3. The standard voltage version of BAU is currently applicable to power modules of PM25X, PM30X, PM40X, and PM50X.

The SPC5K5TR40 IGBT is broken. In theory, 12028-00021 should be used, but feedback indicates there is no stock. Can I use 12028-00008 as a replacement in hardware?
A: The sizes of the electrical component heat sinks for these two part numbers are the same, so they can be substituted as long as the dimensions match.